Is ALMS1 p.Asp591= (c.1773C>T) pathogenic?

ALMS1 p.Asp591= (c.1773C>T) is classified Likely benign in ALMS1 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2026-01-05). Ultra-rare (popmax 0.0446%, eas); Associated with Cardiovascular phenotype.

What condition is associated with ALMS1 p.Asp591= (c.1773C>T)?

ALMS1 p.Asp591= (c.1773C>T) is associated with Cardiovascular phenotype, Alstrom syndrome (ClinVar).

How common is ALMS1 p.Asp591= (c.1773C>T) in the general population?

ALMS1 p.Asp591= (c.1773C>T) is ultra-rare (popmax 0.0446%, eas) (gnomAD).

ALMS1 p.Asp591=

c.1773C>T · rs369744185 · VCV670011

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0446%, eas)

Conditions

Cardiovascular phenotype

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -11	GERP -3.5
Overall
CADD	0.212	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0446% East Asian · 20/44,872 alleles

Filtering AF 0.0295% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0246%

Overall 0.00756% 122/1,613,886 alleles · ultra-rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.0446%	2,244
European (non-Finnish)	0.00831%	12,040
African / African-American	0.00401%	24,963
Remaining individualsnot grpmax-eligible	0.0016%	62,482

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: ALMS1
Protein: p.Asp591=
Coding: c.1773C>T
MANE Select: NM_001378454
dbSNP: rs369744185
Type: single nucleotide variant
Location: chr2:73448300 (GRCh38)
Gene constraint: LOEUF 0.825 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Residue 591: the '34 x 47 aa approximate tandem repeat' region

Full ALMS1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Cardiovascular phenotype — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Alstrom syndrome

Similar variants

ALMS1 p.Asp591Gly Uncertain significance ★★ ⚠ same residue
ALMS1 p.Asp591Val Uncertain significance ★★ ⚠ same residue
ALMS1 p.Asp591Asn Likely benign ★ same residue
ALMS1 c.10079-1G>C Likely pathogenic ★★ same condition
ALMS1 c.10214-2A>G Likely pathogenic ★★ same condition
ALMS1 c.10384+1G>A Likely pathogenic ★★ same condition
ALMS1 c.10385-2A>G Pathogenic ★★ same condition
ALMS1 c.11547+3A>T Likely pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/alms1-p-asp591 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown